72878651 has 8 divisors (see below), whose sum is σ = 76200864. Its totient is φ = 69569280.

The previous prime is 72878579. The next prime is 72878669. The reversal of 72878651 is 15687827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72878651 - 2¹⁸ = 72616507 is a prime.

It is a super-2 number, since 2×72878651² = 10622595543159602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72878681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9515 + ... + 15371.

It is an arithmetic number, because the mean of its divisors is an integer number (9525108).

Almost surely, 2^72878651 is an apocalyptic number.

72878651 is a deficient number, since it is larger than the sum of its proper divisors (3322213).

72878651 is a wasteful number, since it uses less digits than its factorization.

72878651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6421.

The product of its digits is 188160, while the sum is 44.

The square root of 72878651 is about 8536.8993785800. The cubic root of 72878651 is about 417.7022119162.

The spelling of 72878651 in words is "seventy-two million, eight hundred seventy-eight thousand, six hundred fifty-one".